/*

 Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016.  All rights reserved.

 Contact:
 SYSTAP, LLC DBA Blazegraph
 2501 Calvert ST NW #106
 Washington, DC 20008
 licenses@blazegraph.com

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; version 2 of the License.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */
package com.bigdata.btree.proc;

import com.bigdata.btree.raba.IRaba;
import com.bigdata.service.ndx.ClientIndexView;

/**
 * Interface for procedures that are mapped across one or more index partitions
 * based on an array of keys. The keys are interpreted as variable length
 * unsigned byte[]s and MUST be in sorted order. The {@link ClientIndexView}
 * will transparently break down the procedure into one procedure per index
 * partition based on the index partitions spanned by the keys.
 * <p>
 * Note: Implementations of this interface MUST declare an
 * {@link AbstractKeyArrayIndexProcedureConstructor} that will be used to create
 * the instances of the procedure mapped onto the index partitions.
 * 
 * @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
 */
public interface IKeyArrayIndexProcedure<T> extends IIndexProcedure<T> {

    /**
     * The keys.
     * 
     * @return The keys and never <code>null</code>.
     */
	public IRaba getKeys();

	/**
	 * The values.
	 * 
	 * @return The values -or- <code>null</code> if no values were associated
	 *         with the {@link IIndexProcedure}.
	 */
	public IRaba getValues();

}
